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Author Sujatha, S. ♦ Babu, G. S. D.
Source Indian Institute of Astrophysics
Content type Text
File Format PDF
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics
Subject Keyword Open cluster ♦ Photometry ♦ Distance ♦ Age
Description We present the first CCD photometric observations of the open cluster ocl 630 (NGC 2509) in UBVRI filters. It is a fairly nearby cluster at a distance of 912±15 pc, and is placed in the direction of the Puppis constellation as part of the Orion arm in our Galaxy. The age of this cluster is estimated to be ~8x10 to the power 9 years. This cluster is found to be older than M67, but younger than NGC 188, both of which are well known old clusters. Thus, being an old cluster, it is an unsuitable candidate for tracing the spiral arm of our Galaxy.
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Institution Astronomical Society of India
Journal BASI
Volume Number 31
Issue Number 1
Size (in Bytes) 219.20 kB
Page Count 10
Starting Page 9
Ending Page 18